From the following observations, identify the base. 1. a solution conducts electricity and feels slippery. 2. a solution conducts electricity and reacts with metal. 3. a solution is sour and produces hydrogen gas. 4. a solution conducts electricity and forms salts

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substituting a hydrogen atom with a halogen in a hydrocarbon:

- the single bond remains single. a is wrong.

- the bond with hydrogen is as strong as with a halogen. c is wrong

- a hydrocarbon is saturated if there is no double bond. we do not know that so d is wrong.

- carbon will always have four valence electrons. e is wrong.

by elimination, the correct answer is b. the boiling point of the new compound increases.